What Size Should My Bathroom Ventilation Fan Be? 07/28/2017Everyday tasks like showering, bathing and shaving can put home-destructive humidity into the air in your Dallas home. There’s good news however—a modest bathroom ventilation fan can save you from warped wood, mold growth, broken drywall and other issues related with a humid bathroom. Even if you have ventilation fans in your bathrooms, do you know if they’re the proper size? Are they as noiseless and energy efficient as they could be? Tri County Air Care LLC is here to answer your questions. Today’s bathroom ventilation fans are small and smooth and they run more quietly and efficiently than ever before. You’ll find a large range of choices, from average fans that will get the job done to fans with built-in heat lamps, motion sensors and heat-exchanger ventilation that helps prevent warmed air from leaking through your ventilation. While you have a lot of bells and whistles to pick from, the most imperative characteristic of your fan is whether or not it’s full-sized enough to do its job. Rated by the cubic feet per minute (CFM) of air they push, a bathroom ventilation fan should be able to exchange the air in a bathroom at least eight times an hour. With a standard 8-foot ceiling, your ventilation fan should have a CFM rating at least as high as the number of square feet in your bathroom. Thus, if your bathroom is 5 feet by 8 feet, a CFM rating of 40 would be sufficient. If you have a taller ceiling, the equation gets a little more complicated. You’ll want to multiply the width of the room by its height and length, divide it by 60 and multiply by 8. Or, to keep it simple, you can follow HGTV’s advice for bathrooms larger than 100 square feet – verify your CFM requirements by toting 50 CFM for every toilet; 50 CFM for each shower, bath and combo; and 100 CFM for each whirlpool. If you’re unclear if your bathroom ventilation fan is the correct size, or you know it’s the occasion for a new one, give the pros at Tri County Air Care LLC at call at 469-617-3437. We’re here to help you ensure you have a ventilation fan that will run hard to care for your home and keep it cozy. You can even schedule an appointment with us online if that’s simplest for you.